Games created using Source (first-person shooter (FPS) gaming engine created by Valve Corporation) game data file with a navigation mesh that includes points and connected lines that make up potential traversal paths for artificial intelligence (AI) non-player characters (NPCs). This file is used for real-time navigation and movement for AI computer players. The Level Designer component of the Source engine SDK (known as the Valve Hammer Editor) is used to generate the original nodegraph. After completing, an AIN file is automatically compiled and stored to the "/maps/graphs/" folder within the game installation folder.